Fuzzy Logic Based Multi-input Criterion for Handover Decision in Wireless Heterogeneous Networks

Vertical handover is one of the most prominent challenges in heterogeneous networks (Hetnets) since most of the user devices come with mobility feature. In order to provide a seamless handover between various network topologies, several additional parameters other than signal strength must be taken in account to satisfy user preferences at an acceptable level. This paper proposes a fuzzy logic based multi-input criterion for handover decision in wireless heterogeneous networks that uses received signal strength indicator (RSSI), monetary cost, data rate and mobile station (MS) velocity as the input parameters. The simulation results show that proposed fuzzy logic based algorithm gives an improvement in reduction percentage of number of handover as compared to existing systems.